Regex Tester
Test and debug regular expressions. Match highlighting and group extraction.
Local Processing
Files are not uploaded to any server. All operations are performed in your browser.
Pattern Examples
How to Use
- 1
Enter your regex pattern in the pattern field.
- 2
Set flags: global, case-insensitive, or multiline.
- 3
Enter test text in the text area.
- 4
Click 'Test' to see matches and groups.
- 5
Review match positions and extracted groups.
Use Cases
Input Validation
Test regex patterns for validating emails, phone numbers, and custom formats.
Search Patterns
Develop and test search patterns for text extraction and filtering.
Pattern Debugging
Debug regex patterns with match highlighting and group details.
Related Tools
FAQ
How to use this tool?▾
Enter a regex pattern and test text. Matches are highlighted and detailed info shown.
What do the flags do?▾
g finds all matches, i ignores case, m treats start/end as line boundaries.